公开(公告)号：US20220286078A1

公开(公告)日：2022-09-08

申请号：US17752512

申请日：2022-05-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ningbo FENG ,  Chunyang LIU

IPC: H02P29/028 ,  H02P25/22 ,  H02P27/08

Abstract: This application discloses a motor control unit. A type of a power component in a first drive circuit of the motor control unit is different from a type of a power component in a second drive circuit of the motor control unit. A loss of the power component in the first drive circuit is greater than a loss of the power component in the second drive circuit. When determining that a load of the motor is less than a preset load, the control unit controls the first drive circuit to stop working and controls the second drive circuit to work. When determining that the load of the motor is greater than or equal to the preset load, the control unit controls both the first drive circuit and the second drive circuit to work. According to the motor control unit, efficiency of the motor control unit can be effectively improved.

公开(公告)号：US20210408938A1

公开(公告)日：2021-12-30

申请号：US17471701

申请日：2021-09-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ningbo FENG ,  Jie YI ,  Hang WANG ,  Qingyu WANG

IPC: H02M7/537 ,  H01P5/12

Abstract: In an embodiment, an off-grid phase splitter includes: a first input port and a second input port that are separately connected to a power supply; a first output port and a second output port that provide a second voltage, and the second output port and a third output port provide a third voltage; a first capacitor connected between the first output port and the second output port; a second capacitor connected between the second output port and the third output port; a first switch circuit and a second switch circuit connected in series to form a first node between the first input port and the second input port, where the first switch circuit and the second switch circuit are unidirectionally switched on in opposite directions,; and an inductor connected between the first node and the second output port.